Powered by a hard-wired wall wart, this ringing generator outputs  86 V at 20 Hz to activate any telephone ringer or similar device such as fax machine or modem connected to the modular socket shown in the image.

Ringing is activated when the relay contacts, pushbutton switch or footswitch connected to the terminals inside the connection block are closed. 

Operates from 110 Vac standard house current with provided adapter.  

Simple hookup instructions provided.